Flameproof moulding compositions based on polyolefins

US3931081A · kind A · utility

Assignees

• Hoechst GmbH · DE
• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Franz-Josef Dany · Lechenich, DE
• Joachim Wortmann · Kerpen, DE
• Peter Munch
• Gunther Braun · Wuppertal, DE
• Rudolf Kern

Key dates

• Filing date: Jun 25, 1974
• Grant date: Jan 6, 1976
• Expiry date: Jun 25, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2201/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Improved flameproof moulding compositions, which are based on polyolefins and made from a pulverulent blend comprising a polyolefin as its essential ingredient and a plurality of flame-retardant ingredients. The flame-retardant ingredients comprise red phosphorus and at least one organic nitrogen compound which carbonizes after inflammation. The moulding compositions contain the flame-retardant ingredients in a total proportion of at most about 30 weight %. Red phosphorus and organic nitrogen compound are used in a quantitative ratio between 99:1 and 1:99. The improved moulding compositions contain as a stabilizer PA1 A. between about 1 and 10 weight % of amidosulfonic acid or ammonium bisulfate, based on the total quantity of the flame-retardant ingredients, or PA1 B. between about 5 and 15 weight % of a paraffin oil having a density between about 0.83 and 0.88 g/cc and a viscosity between about 15 and 380 centipoises, or of a mineral oil boiling within the range 170.degree. and 350.degree.C, or of a silicon oil, based on the quantity of red phosphorus, or PA1 C. between about 20 and 50 weight % of pentaerythritol, based on the quantity of organic nitrogen compound.